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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95f15550054446d6b744ac9b1e4a29684796ea17e70c5a14069013b908ae6c5b' 
  AND token = 'tATK8ejprP6GuXlgDnp8g61Ha5g9WZjk6MDoojQbkL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}